Help me fix my hesitation and cut out!

dylansword · 08-09-2011, 04:46 AM

I've got an 87 turbo. At about 3-5k rpms, it either hessitates ot completely cuts out.
.
It has the translator pro, aftermarket IC and piping, and full 3in exhaust.

It has new water pump, tps sensor, o2 sensor, spark plugs and wires.

The car came with the translator, because the pervious owner suspected the maf was going out. So I installed it and the car still has hessitating and cutting out problems.

Also, it idels high (the adjuster screw is all the way out), misses a little, and runs rich.

Any suggestion, or things to check will be greatly appreciated!

El Supracabras · 08-09-2011, 11:47 AM

DIAGNOSTIC CODES. Did you check for any yet? Do it now.
The MAFT Pro, is it set to run a MAF or MAP sensor?

dylansword · 08-10-2011, 12:40 AM

I just checked for codes. There is none. And it is set for maf

dylansword · 08-10-2011, 03:17 AM

I just replaced the fuel filter and turned the boost down to 7 psi and it is still cutting out.

Could the ecu be cutting fuel too early?

dylansword · 08-10-2011, 03:27 AM

Also, when the car is in neutral, it revs up and spools with no problem at all. And as well as when I peel out, and the tires are spinning, it doesnt cut out..

El Supracabras · 08-11-2011, 03:26 AM

If there are no codes present, you might just have a boost leak. They can be tricky to find. It sounds like it's only happening under boost. You can also check the spark plugs if you haven't changed them in awhile.

cre · 08-11-2011, 07:24 AM

Do you have a wideband installed? Is the AFR spiking past 20:1 when this happens? Have you done any tuning? If so, what?

dylansword · 08-11-2011, 05:51 PM

I don't have a wideband, but I will be getting one. (Recomindations are valued). And as far as tuning I have the maft pro, and everything is set to what the manual says.

cre · 08-11-2011, 11:44 PM

The manual doesn't cover how to tune or any significant fuel adjustments... look to see if the mainscale is anything other than 0 and check to see if the fuel "tune" maps are all zeroed out or not. I know you have a MAFT Pro and it's safe to say I know a tiny bit about them.

dylansword · 08-11-2011, 11:59 PM

I don't have the manual for the translator, the car came with everything but that when I bought it. I found everytging I know about it online.

So, could you breifly explain the main scale adjustment? I think I know which ones your talking about for the fuel tune ones.

Also, when the car is running, the tps, o2, and spark all show 0 and don't change... should they?

08-09-2011, 04:46 AM	#1
dylansword 3" Exhaust Join Date: Jan 2010 Location: boise id Posts: 50	Help me fix my hesitation and cut out! I've got an 87 turbo. At about 3-5k rpms, it either hessitates ot completely cuts out. . It has the translator pro, aftermarket IC and piping, and full 3in exhaust. It has new water pump, tps sensor, o2 sensor, spark plugs and wires. The car came with the translator, because the pervious owner suspected the maf was going out. So I installed it and the car still has hessitating and cutting out problems. Also, it idels high (the adjuster screw is all the way out), misses a little, and runs rich. Any suggestion, or things to check will be greatly appreciated!

08-11-2011, 07:24 AM	#7
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	Do you have a wideband installed? Is the AFR spiking past 20:1 when this happens? Have you done any tuning? If so, what? __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

08-11-2011, 11:44 PM	#9
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	The manual doesn't cover how to tune or any significant fuel adjustments... look to see if the mainscale is anything other than 0 and check to see if the fuel "tune" maps are all zeroed out or not. I know you have a MAFT Pro and it's safe to say I know a tiny bit about them. __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

08-09-2011, 11:47 AM	#2
El Supracabras 3" Exhaust Join Date: Feb 2010 Location: Chicago Posts: 240	DIAGNOSTIC CODES. Did you check for any yet? Do it now. The MAFT Pro, is it set to run a MAF or MAP sensor?

08-10-2011, 12:40 AM	#3
dylansword 3" Exhaust Join Date: Jan 2010 Location: boise id Posts: 50	I just checked for codes. There is none. And it is set for maf

08-10-2011, 03:17 AM	#4
dylansword 3" Exhaust Join Date: Jan 2010 Location: boise id Posts: 50	I just replaced the fuel filter and turned the boost down to 7 psi and it is still cutting out. Could the ecu be cutting fuel too early?

08-10-2011, 03:27 AM	#5
dylansword 3" Exhaust Join Date: Jan 2010 Location: boise id Posts: 50	Also, when the car is in neutral, it revs up and spools with no problem at all. And as well as when I peel out, and the tires are spinning, it doesnt cut out..

08-11-2011, 03:26 AM	#6
El Supracabras 3" Exhaust Join Date: Feb 2010 Location: Chicago Posts: 240	If there are no codes present, you might just have a boost leak. They can be tricky to find. It sounds like it's only happening under boost. You can also check the spark plugs if you haven't changed them in awhile.

08-11-2011, 05:51 PM	#8
dylansword 3" Exhaust Join Date: Jan 2010 Location: boise id Posts: 50	I don't have a wideband, but I will be getting one. (Recomindations are valued). And as far as tuning I have the maft pro, and everything is set to what the manual says.

08-11-2011, 11:59 PM	#10
dylansword 3" Exhaust Join Date: Jan 2010 Location: boise id Posts: 50	I don't have the manual for the translator, the car came with everything but that when I bought it. I found everytging I know about it online. So, could you breifly explain the main scale adjustment? I think I know which ones your talking about for the fuel tune ones. Also, when the car is running, the tps, o2, and spark all show 0 and don't change... should they?